Syracuse, N.Y. -- Nearly a year after it first surfaced, the H1N1 virus has practically vanished in Central New York.

But Dr. Cynthia Morrow, Onondaga County’s health commissioner, said the virus, known as the swine flu, still poses a potential threat to people who have not been vaccinated.

In the last eight weeks, there has been only one lab-confirmed flu case in Onondaga County and it’s unknown if that case was H1N1 or regular seasonal flu, she said. There’s been little H1N1 activity statewide or elsewhere in the Northeast.

But health officials are keeping an eye on a recent spike of H1N1 cases in Georgia and other parts of the Southeast.

“As long as there is influenza activity anywhere it could come back,” Morrow said.